Don't let Destroyer discourage you. I'm sure you probably know that it's meant to be a learning tool and it's named "Destroyer" for a reason. If you don't have a subscription to Chad's videos I strongly recommend it, because he really teaches you the absolute essentials for the DAT.
As far as remembering reactions, I suggest making your own roadmaps. It's the technique I used for both Orgo I and II and it helped me get high A's in both classes.
So what I did while watching Chad's was to take notes in order to be attentive. These notes served no real purpose other than to physically write down my thought process. During these notes, I'd write little things like "MCPBA makes an oxygen birthday party hat!" Yes it's stupid, but it helps to remember.
The next thing I did was to make one roadmap for every functional group. So for example, I'd put an alkene in the center of a 8.5x11 white page and have lines coming out of it for all the reagents that react with alkenes. Along with the reagents, I would put stuff like "antimarkovnikov" or "sn2," basically any details that accompanied that specific reaction.
However, what's really important is to make this roadmap highly organized. So you should do things like put all the antimarkovnikov products clustered in a corner, etc. The reason this method and the destroyer road maps work so well is because when you come across a reaction problem, you have this "map" in your head where you can picture all the reagents and products you wrote down, which helps you to come to a conclusion for an answer. I've found that making your own maps is SO much more fruitful than memorizing some because it's organized the way YOU want it to be organized.
It's tedious, but definitely worth it. Good luck!
